MARTA is eyeing nearly 12 miles of existing right-of-way north of North Springs MARTA station in Dunwoody, Ga., to Windward Parkway in Alpharetta, Ga. The project, if implemented, would be the first expansion of the MARTA system since the Sandy Springs and North Springs stations opened in 2000, also on the Georgia 400 corridor, which runs north-northeast from Atlanta.

"That area has been growing by leaps and bounds, particularly in terms of employment," MARTA Project Manager Janide Sidifall said to local media. "It's a huge employment center."

MARTA cost estimates on three technology options will be available at a public meeting Sept. 26 rviewing the project, Sidifall said.

Created in 1972, MARTA began operating rapid rail transit in June 1979.